Unidentified Vacuum Line Near EGR on 7M-GE - Heater Valve Connection

During engine reassembly on a 1987 7M-GE, one remaining vacuum line at the corner of the intake manifold near the EGR system had no clear destination. The owner initially assumed it connected to the cruise control T-splitter but was unsure.

The vacuum line from the intake manifold near the EGR system connects to a T-splitter that feeds both the heater valve and cruise control. During reassembly with the engine on a stand, this routing was not obvious because the firewall-side plastic vacuum line and heater valve assembly were still in the engine bay.

Moderate confidence — Original poster confirmed this resolved the issue